Originally the dimensions of a rectangle were 20 cm by 23 cm. When both dimensions were decreased by the
same amount, the area of the rectangle decreased by 120 2
. Find the dimensions of the new rectangle.

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Find the quotient with the restriction.

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17